Valve disk



FIG. 1 is a perspective view of the valve disk;

FIG. 2 is a front view of the valve disk;

FIG. 3 is a rear view of the valve disk;

FIG. 4 is a right side view of the valve disk;

FIG. 5 is a left side view of the valve disk; and,

FIG. 6 is a cross-sectional view of the clutch housing.

The dashed lines are provided simply to show the environment and form no part of the invention. 

The ornamental design for the valve disk, as shown and described. 